The BMW E30 M3 1990 Workshop Repair Service Manual is a comprehensive guide designed to empower you with the knowledge and instructions needed to service, maintain, and troubleshoot your vehicle. This manual delves into every aspect of your BMW E30 M3, covering all models, engines, trim levels, and transmission types. It provides detailed information on a wide range of topics, including engine repair and maintenance, transmission and drivetrain systems, electrical and electronic systems, body and paint, suspension and steering, brakes, and more. With clear, step-by-step instructions, illustrations, and diagrams, this manual equips you with the necessary tools to handle any repairs or maintenance tasks confidently. Whether you're a seasoned mechanic or a DIY enthusiast, this manual serves as your ultimate resource for ensuring the longevity and optimal performance of your BMW E30 M3.

The BMW E30 M3, produced from 1986 to 1991, is a high-performance variant of the E30 3 Series, renowned for its motorsport heritage and legendary status. It was conceived as a homologation special to allow BMW to compete in the European Touring Car Championship (ETCC) and quickly established itself as a dominant force in the series. The E30 M3's success stemmed from its meticulously engineered combination of lightweight construction, powerful engine, and precise handling. The heart of the E30 M3 lies in its naturally aspirated 2.3-liter S14 four-cylinder engine, producing a thrilling 195 hp and 171 lb-ft of torque. This engine, specially developed for the M3, featured advanced technology such as a forged crankshaft, lightweight pistons, and a high-flow exhaust system, allowing it to rev freely to its 7,000 rpm redline. Beyond the engine, the E30 M3 showcased comprehensive modifications aimed at enhancing performance and handling. Notably, its bodywork was widened, featuring flared wheel arches to accommodate larger wheels and tires. The suspension was meticulously tuned, incorporating stiffer springs and dampers, larger anti-roll bars, and a unique rear axle setup to guarantee exceptional precision and grip. The E30 M3 also boasted a lightweight interior, with features such as thin-gauge body panels, lightweight seats, and reduced sound insulation. This attention to detail ensured a perfect balance of performance and agility, making it a true driver's car. The E30 M3's impact on the automotive world continues to resonate today, cementing its place as one of the most iconic and influential performance cars ever built. Its timeless design, powerful performance, and legendary racing heritage make it a highly sought-after collectible and a symbol of BMW's commitment to motorsport excellence.